Fix compilation on non-sse2 platforms

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>

diff -uNr libyuv-1411.org/include/libyuv/scale_row.h libyuv-1411/include/libyuv/scale_row.h
--- libyuv-1411.org/include/libyuv/scale_row.h	2015-05-22 23:39:21.000000000 +0200
+++ libyuv-1411/include/libyuv/scale_row.h	2015-05-25 12:35:17.000000000 +0200
@@ -33,7 +33,7 @@
 
 // The following are available on all x86 platforms:
 #if !defined(LIBYUV_DISABLE_X86) && \
-    (defined(_M_IX86) || defined(__x86_64__) || defined(__i386__))
+    (defined(_M_IX86) || defined(__x86_64__) || (defined(__i386__) && defined(__SSE2__)))
 #define HAS_FIXEDDIV1_X86
 #define HAS_FIXEDDIV_X86
 #define HAS_SCALEADDROWS_SSE2